Road machine



Aug. 7, 1934. J. E. CARLSON ROAD MACHINE Filed Jan. 30, 1932 6Sheets-Sheet l INVENTOR JIQMES E ARLS 0N ATI'ORNE$ Aug. i 1934. J. E.CARLSON ROAD MACH I NE Filed Jan. 30, 1932 6 Sheets-Sheet 2 k) H l INVENTOR JAMES 5. BY

RLso/v Q 44 4 ATTORNEY Aug. 7, 1934. CARLSQN 1,969,204

ROAD MACHINE Filed Jan. 30, 1932 6 Sheets-Sheet 3 I .4. ,INVENTOR;

W J4ME$ 5. C RLSON ATTORNEY Aug. 7, 1934- J. E. CARLSON 1,959,204

ROAD MACHINE Filed Jan. 30, 1932 6 Sheets-Sheet 4 4:5 .55 BY M ATTORNEY1934- J. E. CARLSON 1,969,204

ROAD MACHINE Filed Jan. 30, 1932 6 Sheets-Sheet 5 INVENTOR F 7 JA MES E.RLS 0N ATTORN EY 7, 1934. J. E. CARLSON 1,969,204

ROAD MACHINE Filed Jan. 30, 1932 6 Shee'ts-Sheet 6 as ,5/ as film-1:ELK-ll:

INVENT R Jhmss CR so/v BY ATTORNEY Patented Aug. 7, 1934 UNITED STATESPATENT OFFICE ROAD MACHINE James E. Carlson, Minneapolis, Minn.Application January 90, 1932, Serial No. 599,912

42 Claims. (01. 37-153 This invention relates to road working machinery,and the primary object is to provide means of a novel, eflicient andpractical nature for maintaining and repairing dirt, clay, and gravelroads, by effectively removing transverse as well as longitudinalgrooves and corrugations therein, and also for use in mixing oils orother applied preparations into the surface material of the road withoutshifting the latter transversely across the road as would for instancebe the case when employing a conventional grader blade. Moreparticularlythe object is to provide an attachment for already built andexisting types of road machines now in use, so as to greatly improve thesame, and to this end I provide a road working unit adapted to becarried by the mechanism which normally carries and regulates otherinstrumentalities such as a conventional grader blade, and scarifier,and this unit embodiescertain construction features some of which aresimilar to those disclosed in my copending patent application-Serial No.525,383, filed March 26th, 1931, for Road grader, and Serial No.589,911, filed January 30th, 1932, for Road working machine. Moredetailed and specific objects will be disclosed in the course of thefollowing specification, reference being had to the accompanyingdrawings, wherein:

Fig. 1 is a side elevation of a well known commercial type of powergrader which has been equipped with a working unit embodying myinvention.

Fig. 2 is a plan view of the machine as shown in Fig. 1, but showing theplaner and trowelling unit in an operative angular position, rather thanin the directly transverse position shown in Fig. 1.

Fig. 3 is an enlarged detail plan view of the left end portion of myattachment unit.

Fig. 4 is a front elevation of the structure shown in Fig. 3.

Fig. 5 is an end elevation of the unit as seen on the line 5-5 in Fig.3.

Fig. 6 is a sectional elevation on the line 6-6 in Fig. 3; thearrangement in this view, as in Fig. 1, differing from the disclosuresin Figs. 4 and 5, in that the latter figures show the planer bladesraised from the operative elevation still assumed by the troweller beam,while in Figs. 1

and 6 the planer blades are shown as in active cutting engagement withthe roadsurface.

Fig. 7 is a side elevation of the forward portion of a power gradingmachine, as shown in Fig. l, but showing a modified form of planer unit,and showing said unit as interchanged with the usual scarifler mechanismwhich has been removed. In this case also the trowelling beam isomitted.

Fig. 8 is a plan view of the structure as shown in Fig. '7, and with a,portion of the main frame and controls broken away for purpose ofillustration.

Fig. 9 is a detail sectional elevation 0n the line 99 in Fig. 8.

Fig. 10 is a side elevation similar to Fig. '7, but partly in section ason the line 10--10 in Fig. 11, showing a still further modified form ofthe invention. 1

Fig. 11 is a plan view of the machine shown in Fig. 10.

Fig. 12 is a detail section on the line 12-12 in Fig. 13.

Fig. 13 is an enlarged detail elevation of the stabilizer shoe, as onthe line 1313 in Fig. 11.

Fig. 14 is an enlarged detail view of one of 7 the telescopic liftdevices for the secondary or implement frame, the same having fractionalportions broken away for purpose of illustration.

Fig. 15 is a detail view showing a modified bracket for mounting thestabilizer shoe when the planer beam is operated in an angular position.

Referring to the drawings more particularly and by reference characters,A designates a main frame of a power grader having front wheels 16, reartraction wheels 17, and a power plant 18. A secondary or implement frameB is disposed under the main frame in'advance of the power unit 18, andhas its front end pivotally secured as at 19 while its rear portion iscarried, for angular and vertical adjustment, by a pair of laterallydisposed depending links 20, the lower ends of which are pivotallyattached to the frame B, as at 21, while their upper ends are" pivotallyconnected, as at 22, to crank arms 23. The cranks 23 are carried by theouterends of a transversely disposed shaft 24, on the frame A, and arerespectively and individually oscillated by hand wheels 25, at the rearof the machine, operating screw shafts 26 engaging sleeve extensions 27.Spring devices such as 28 are preferably employed to partiallycounterbalance the weight of the frame B, and tools carried thereby,thus minimizing the effort required to vertically and angularly adjustthe tool frame.

In order that the road engaging blade, such as 29 in Figs. '7 and 8, orother tool may be angularly adjusted with respect to the longitudinalaxis of the machine, such tool or blade is secured to the frame B by anoscillatable connection, which, as shown comprises a circle" made up ofan upper section 30 secured to the frame B and a lower section 31 whichcarries the tool and is slidably interlocked with the upper section 30,as shown for instance in Fig. 4. The two circle sections may berelatively adjusted in any suitable manner, and the shaft 32 and handwheel 33 may be employed to effect such adjustment from the rear of themachine, in which event the forward end of the shaft may actuate thecircle section 31 through suitable means (not shown) such as a worm orbevel pinion.

As more or less conventional equipment for machines of this character itis customary to provide the front end thereof with a scarifier frame C,which is pivotally mounted, as at 34, and has its rear end provided withsuitable scarifying teeth 35. The rear end of the frame C is verticallyadjusted by links 36 which depend from cranks 3'7, rigid on a transverseshaft 38, and this shaft is in turn oscillated, through suitableconnections, by a shaft 39 having a hand wheel 40 near the operator'sstation.

All the mechanisms thus far described are of conventional design andconstruction, and I claim nothing new therein except as such mechanismsor parts thereof may contribute to the novelty and efliciency of thefunction and operation of the devices and arrangement of elements whichI combine therewith, and which will now be described in detail.

Reference is first made to the form of the invention illustrated inFigs. 1 to 6, inclusive, in which event the scarifier mechanism C and34-40 is not brought into use, and the planer and trowelling devices areboth carried by and under the circle 30-31 so as to be vertically andangularly adjustable together with the tool frame B under thecontrolling action of the hand wheels 25, and will also be subject toangular control with respect to the path of travel under the influenceof hand wheel 33.

A plurality of road engaging planer blades 41 are secured by bolts 42 tobrackets 43 which are in turn secured by bolts 44 to the underside of achannel beam 45. This beam is rigidly secured to the circle section 31by depending bracket arms 46 and angular braces 47. Thus it will be seenthat the planer blades 41 are rigidly mounted with respect to the mainframe A, yet are adjustable, as a series and together with the beam 45,vertically and also from the transverse position shown in Fig. 1 to thehorizontally oblique position as shown in Fig.2. It may here be notedthat when the cutting blades are set at as great an angle with respectto the beam 45 as shown in Figs. 2 and 3, it is obviously necessary toadjust the beam 45 to a relatively more acute angle with respect to theline of travel, than would otherwise be the case, particularly when theblades are used for substantial cutting, as distinguished from the oilmixing function, as it is desirable to have the successive cutting edgesof the blades effect, as nearly as possible, a continuous compositecutting plane. It is also desirable, if not an absolute necessity, thatthe cutting edges of the blades 41 be maintained in a horizontal planewhen actually engaged in the cutting operation, and in order thatadjustments may be made to compensate for different cutting depths andto allow for other variable conditions as found in different graders, Iprovide the upper end of the braces 47 with series of holes 48 forselective engagement with the securing bolts 49, and when suchadjustments are found necessary it will be noted that the entire beamwill be free to swing up and down slightly from the securing pivot bolts50 at the lower end of the brackets 46 (Figs. 5-6).

An important feature of the present invention resides in the specificform and arrangement of the planer blades 41. These blades, as withltheplaner blades 22 in my above noted application for patent Serial No.525,383, are parallel, and disposed at an oblique angle with respect tothe direction of travel, so as to have acute cutting actions in the roadsurface, which is obviously much more effective than the blunt hoeingaction of a conventional scraper blade which is normally operated at acomparatively wide angle with respect to the direction of travel. Thisarrangement also permits the taking of a relatively deeper cut in theroad surface, with a result that the corrugations can be more completelyremoved than with a straight single blade which in most instances merelyscrapes oif the tops of the ridges and fills in the hollows, a notdesirable condition. When in actual use for planing purposes the lowercutting edges of the blades 41, operate in as nearly a horizontal planeas possible so that the entire cutting edge of each blade will have auniform cutting. depth and action, and it is also preferable to maintainthe beam. 45 at a suflicient angle with respect tothe longitudinal axisof the machine so that the blade paths will overlap, thus preventing thepossibility of uncut strips being left between the blades. When themachine is only being used for mixing oil or other substances into aloose gravel or top soil this condition is not of as great importanceand if a wider strip of road is to be covered the beam 45 can be set ata more nearly crosswise position of the machine.

An important and novel distinction in the blades 41 over those of myearlier application Serial No. 525,383, lies in the fact that instead ofbeing mounted vertical and having an undercurved cutting edge, I now usestraight plates and mount them on the brackets 43 in a decided inclineor angle with respect to the perpendicular (see Fig. 4), and then bevelthe cutting edges, as at 51, so that as the blades are forced throughthe road material they will not only have a slicing action by virtue oftheir oblique position with respect to the line of draft, but will havedecided forwardly directed cutting edges that will have a planing orslicing action as distinguished from the scraping effect of asubstantially vertical blade or blades having no forwardly directedcutting edge. This angular position of the blades 41, with respect tothe perpendicular, also results in distinct advantages over blades suchas shown in my application Serial No. 525,383, in that they do notrequire a bending or forming operation, and can be worn off practicallyup to the brackets 43 before requiring replacement, thus utilizing amaximum amount of blade material. It is also found, particularly wherethe working faces of the blades 41 are hardened, that the blade willhave a self-sharpening action when in use, thus maintaining the bevel 51and the forwardly directed cutting edge adjacent thereto.

The trowelling unit, shown in Figs. 1-6, comprises an elongated angleiron beam 52 to the underside of the horizontal flange of which isdetachably secured, as by stud bolts 53, a wear plate 54 having roundedor beveled front and rear edges 55. The vertical flange of the beam 52is preferably provided with a forwardly curved shield 56 to prevent anypossibility of dirt or gravel passing rearwardly over the beam.

The beam 52 is carried by a pair of L-shaped yokes 57, the front ends ofwhich are pivoted, as at 58, to anchor plates 59 secured to the channelbeam 45 as by bolts 60. The depending rear leg portions of the yokes 57are pivotally secured, at 61, to lugs 62 rigid with the beam 52, andhave set screws 63, above and below the pivot centers 61, for renderingthe beam unit 52 rigid with respect to the yokes 53 and also forproviding angular adjustments to the beam to compensate forirregularities in wear or other variable circumstances. It will also beseen that by tilting the beam forwardly or rearwardly it is possible topredetermine, to some degree, the volume of earth pushed ahead of andtransversely distributed by the beam and the flowage of material underthe trowelling shoe 54.

The trowelling unit is yieldingly held down in operative contact withthe road surface under the depressing action of a pair of springs64'which are compressed between the yokes 57 and heads 65 of bolts 66,the lower ends of which are adjustably anchored as at 67 to armextensions of the plates 59. This arrangement permits the troweller tobe used alone, as shown in Figs. 4 and 5, when so desired, by partiallylifting the frame B, and gives added pressure to the plate 54 when mostneeded, i. e., when both units are being employed, as in Figs. 1 and 6.The yokes 57 are preferably provided with re-enforcing braces 68, and tooffset or counteract the end thrust action of the trowelling beam withrespect to the planer unit I also provide angular brace rods 69 betweenthe two units, these rods having pivot connections '70 with the beam 45in axial alignment with the pivot centers 58 so as not to interfere withthe previously noted vertical adjustments as between the two workingunits.

The operation and use of the machine as thus far described may be setforth as follows:

Under ordinary road maintenance conditions where it is desirable tooperate the machine for the sole purpose of evening out irregularitiessuch as transverse corrugations, as well as longitudinal extendinggrooves and ruts, the planer blades are lowered by manipulating the handwheels 25 until their cutting edges are operating at a depth which issufficient to remove all ridges and projections which may exist. It isimportant that the blades 41 should not be operated at a depth lowerthan the bottoms of the corrugations except in special cases where it isdesired to bring up dirt or clay to mix with the gravel or surfacingmaterial for a binder therewith. The planer blade supporting beam 45, aswell as the trowelling beam 52, may be operated at any angle from thetransverse position, as indicated in Fig. 11, to the oblique positionshown in Fig. 2, depending upon the type of work being done and thevariable conditions that may be met with in different roads. In anyevent the road or surface material cut from the road by the blades 41will not be shifted transversely as with an ordinary conventional graderblade, but will be deposited or left in strips immediately behind therespective blades 41, in which condition they are next acted upon by thetrowelling beam 52 and the smoothing shoe 54 secured thereunder.

As the trowelling beam comes into active contact with the dirt or gravelloosened up by the planer blades, such material has a tendency toaccumulate in front of the trowelling beam, but

gradually finds its way under the shoe 54 because of the beveled edge 55and the flexibility provided through the medium of the springs 64 whichhave a tendency to exert a uniform and consistent downward pressure uponthe trowelling beam at all times. little tendency for thetrowelling-beam to shift the loose road material to one side or theother, as with an ordinary grader blade, it will serve to eliminate orremove all loose rocks or small boulders and stones from the roadbecause such objects will not pass under the shoe 54 but will bedelivered laterally of the machine by the beam 52. Rocks or otherobjects which are small enough to get under the beveled edge 55 of theshoe 54 will ordinarily be pressed down into the road surface as theshoe passes thereover, with a result that the road is left in a smoothand even condition.

It will thus be seen'that the planer blades 41 will, because of theirdesign and arrangement in the machine, effect a very uniform and regularslicing or shaving action on the road surface and in doing so do nottear, rip up, or agitate the road as is done with ordinary scariflers,and will not shift the cut material to either side of the machine aswith a conventional grader blade.

With reference to the trowelling beam, it is also distinguishable fromconventional grader structures in that it does not have a decidedlateral shifting action although its vertical front face will of coursehave a material distributing action, and does not in fact cut into theroad surface at all as does the conventional grader blade because of thebevel or slant 55 at the forward edge of the shoe 54, and also isprimarily intended for exerting pressure downwardly upon the road underthe action of the springs 64, which a grader blade will do under nocircumstances, and under this depressing action will cause a smoothingover of the road material which cannot be done in any other way.

This smoothing action of the shoe 54 is of such importance that it mayfrequently be found desirable to run the machine using this implementonly, in which event the parts are adjusted to the positions shown inFigs. 4 and 5, wherein it will be seen that the blades 41 have beenraised entirely out of engagement with the road and that the beam 52,due to the change in angle of the frame 5'7, has been adjusted on thecenters 61 by the set screws 63 so as to have proper operative contactwith the road surface.

When using the machine for the purpose of mixing oil or other treatingsubstances with the road material, the blades 41 can be operated at anydesired depth, depending upon the degree of penetration desired for theoil or other substance. In any event the action of the blades 41 inmixing the materials will no doubt be readily understood as therespective blades will operate in much the same manner as an ordinaryplow, in that they will cut up a strip or ribbon of the road which hasbeen treated and by turning it over will effect the desired mixingaction, and as the trowelling beam 52 then continues to operate it willfirmly press the mixed material down into place.

In the machine illustrated in Figs. '7, 8, and 9,

the conventional grader mechanism proper is in i noway disturbed, andthe usual scraper blade 29 is manipulated or adjusted in the usual way..It is not, however, used for the purposes of reducing hard ridges orcorrugations, but is preferably disposed in a transverse position and isIt may be noted that while there is merely employ for leveling off theloose material that has n cut off by the planer unit designated generfilby the letter D.

The unit D comprises a channel iron beam '71 which carries the planerblades '72 and is mounted, as by securing bracket 73, and bolts '74, tothe scarifier frame C, and is substituted for the usual scarifler teeth35. Thus it will be seen that the planer unit D may be readily andconveniently operated by the devices 36-40 and may be used optionallywith or independently of the blade 29 and without in any way interferingwith the mechanisms of or controls for the frame 3, nor function of theblade 29. In this instance, as will be noted in Figs. 8 and 9,

the blades '72 are designed in much the same manner as the previouslydescribed blades 41, but instead of all being parallel, as in Figs. 2and 11, they are arranged in two groups with the blades in one groupdisposed at reversely oblique directions with respect to the blades ofthe other group, which arrangement equalizes the end thrust imparted tothe beams '72 by-the two groups of blades when in working or cuttingengagement with the road, as in my previously filed application SerialNo. 525,383.

In the modification of the invention, as shown in Figs. 10 to 15,inclusive, the scarifier mechanism is left in its raised or idleposition, and the planer and trowelling devices are both carried byframe B, but in somewhat different manner than as shown in Figs. l-6.Thus the trowelling b'eam '76 is rigidly secured, as by brackets '77, tothe conventional blade structure 78, without necessarily removing theblade 29, and the required flexibility of contact is had with the roadsurface through the action of springs '79 in telescopic lift units madeup of inner and outer tubes and 81, one each of which units issubstituted for the previously described links 20. The relativemovements of the tubes 80-81 of each unit is limited by a pin 82operating in a slot 83 (Fig. 14). It will thus be seen that while thecranks 23 are operative to lift the entire mechanism from the ground,when the units 78-83 are fully extended, they may also function toregulate the downward pressure on the road tools through the yieldingaction of the springs '79.

The planer unit, as shown in Figs. 10-15, is made up of a beam 84 havingblades 85, similar to the corresponding elements in Figs. l-6, butinstead of being rigid with the'circle section 31 the beam 84 isflexibly connected thereto by forwardly extending push arms 86 and bracerods 8'7 which are pivotally anchored, as. at 88, to bracket extensions89 of a supplemental frame 90 secured to the circle section 31.

The frame 90 has a cross bar 91, at its forward end, disposed directlyover the beam 84 and connected therewith by a series of expansionsprings 92 and tie bolts 93. The bolts 93 which are adjustable as tolength and slidable in one or the other of the beams (84 or 91) serve tolimit the spread between the beams, while the springs 92 act to hold theplaner blades 85 incutting engagement with the road.

With the foregoing described construction it is obviously impossible, orat least impractical, to regulate the cutting depth of the blades 85through the devices controlled by the hand wheels 25, and consequentlyother means are provided, and, in the present instance consists of apair of shoe castings 94, one at each end of the beam 84 and havingdirect sliding contact with the road surface independently of thetroweller unit and also of the ground wheels 18-17. The shoes 94 havefront and-rear road engaging surfaces, and are pivotally connected, atpoints intermediate said surfaces, by pins 95, to frames or arms 96,which arms may be designed as shown either in Figs. 11 and 15, dependingupon the operative angle of the beam 84. The arms 96 are pivotallyconnected at their inner ends to the beam 84, as at 9'7, andareadjustably secured to the beam by bolts 98 having nuts 99, the latterof which may be employed to regulate the working depth of the blades 85with respect to the road surfaces traversed by the shoes 94.

It will thus be seen that with the mechanisms shown in Figs. 10-15, thetwo road working. units can be raised and lowered through the action ofthe hand wheels 25, but, that while in action, the primary function ofthe crank arm 23) movements is to increase or decrease the pressure uponone or both ends of the trowelling unit, as occasion may require. It mayalso be noted that the structure of Figs. 10-15 differs from thosepreviously described in that it provides freedom for upward yieldingaction of both working units when obstructions are met with requiringsuch movements.

It is understood that suitable modifications may be made to thestructure as disclosed, provided such modifications come within thespirit and scope of the appended claims. Having now therefore fullyillustrated and described my invention, what I claim to be new anddesire to protect by Letters Patent is:

1. In a road machine, a suitable frame, a tiltable trowelling unitattached to the frame and disposed in a generally crosswise positionwith respect to the direction of travel, said unit having an uprightforward face, for accumulating loose material in front of the unit, anda bottom surface for trowelling engagement with the road, said bottomsurface of the unit being upwardly beveled at its forward edge so as toeffect and facilitate feeding action of said loose material in adirection under the unit as the machine moves forwardly, and threadedmeans for gradually tilting the trowelling unit to obtain a properworking relationship with the road.

2. In a road machine, a suitable frame, a trowelling unit tiltable on anaxis extending longitudinally thereof and attached to the frame anddisposed in a generally crosswise position with respect to the directionof travel, said unit having an upright forward face, for accumulatingloose material in front of the unit, and a bottom surface for trowellingengagement with the road, and means including adjuster screws disposedabove and below said tilting axis for tiltably adjusting the trowellingunit on its axis.

3. A road machine comprising a main frame having suitable groundsupports, a transversely disposed vertically adjustable beam adjustablycarried underv the frame, means for yieldably pressing the beamdownwardly, a plurality of angularly disposed blades carried by thebeam, and 140 devices at the ends of said beam for engaging the roadsurface to limit the cutting depth of said blades independently of thesaid main frame ground supports.

4. The combination with a road machine hav- 145 ing a vertically andangularly adjustable tool frame and a circle member carried by saidframe for adjustment about a vertical axis, of a tool beam disposedtransversely of the machine under the circle and rigidly secured theretofor adjustment therewith, a series of planer blades secured under and tothe beam, and a trowelling beam disposed rearwardly with respect to theblades and also carried by the circle so as to be adjustable therewithand in unison with the tool beam.

5. The combination with a road machine having a vertically and angularlyadjustable tool frame and a circle member carried by said frame foradjustment about a vertical axis, of a tool beam disposed transverselyof the machine under the circle and rigidly secured thereto foradjustment therewith, a series of planer blades secured under and to thebeam, and a trowelling beam disposed rearwardly with respect to theblades and also carried by the circle so as to be adjustable therewithand in unison with the tool beam, said trowelling beam being verticallymovable with respect to the blades, and means for yieldingly depressingthe beam with respect to the blades.

6. The combination with a road machine having a vertically and angularlyadjustable tool frame and a circle member carried by said frame foradjustment about a vertical axis, of an attachment frame detachablysecured to the circle member so as to be axially, vertically, andangularly adjustable therewith, a pair of road working units carried bythe attachment frame in fore and aft positions and.- transversely withrespect to the machine, and means for yieldably mounting the roadworking units with respect to eachother whereby one of them may yieldvertically in response to variations in road surface resistance.

7. The combination with a road machine having a vertically and angularlyadjustable tool frame and a circle member carried by said frame foradjustment about a vertical axis, of an attachment frame detachablysecured to the circle member so as to be axially, vertically, andangularly adjustable therewith, a pair of road working units carried bythe attachment frame in fore and aft positions and transversely withrespect to the machine, and spring means for yieldably depressing one ofthe units with respect to the other.

8. The combination with a road machine having a vertically and angularlyadjustable tool frame and a circle member carriedby said frame foradjustment about a vertical axis, of an attachment frame detachablysecured to the circle member so as to be axially, vertically, andangularly adjustable therewith, a pair of road working units carried bythe attachment frame in fore and aft positions and transversely withrespect to the machine, and means for vertically adjusting the roadworking units with respect to each other, the forward of said unitshaving a series of angularly disposed blades for cutting strips of roadsurface, and the rear of said units having a beveled beam for trowellingover the cut road material.

9. The combination with a road machine having a vertically and angularlyadjustable tool frame and a circle member carried by said frame foradjustment about a vertical axis, of an attachment frame detachablysecured to the circle member so as to be axially, vertically, andangularly adjustable therewith, a pair of road working units carried bythe attachment frame in fore and aft positions and transversely withrespect to the machine, and spring means for yieldably depressing one ofthe units with respect to the other, a series of angularly disposedblades for cutting strips of road surface, and the rear of said unitshaving a beveled beam for trowelling over the cut road material.

10. The combination with an axially, vertically, and angularlyadjustable circle member of a road machine, of an attachment framerigidly secured to the circle so as to be adjustable therewith, a toolbeam secured to the attachment frame, a plurality of planer toolscarried by the beam, and a trowelling beam carried by the attachmentframe and disposed for operation on the road surface rearwardly of theplaner tools.

11. The combination with an axially, vertically, and angularlyadjustable circle member of a road machine, of an attachment framerigidly secured to the circle so as to be adjustable therewith, a toolbeam secured to the attachment frame, a plurality of planer toolscarried by the beam, means for tiltably adjusting the beam with respectto the circle, and a trowelling beam carried by the attachment frame andhaving a beveled under surface for smoothening the road portiontraversed by said planer tools.

12. The combination with an axially, vertically, and angularlyadjustable circle member of a road machine, of an attachment framerigidly secured to the circle so as to be adjustable therewith, a toolbeam secured to the attachment frame, a plurality of planer toolscarried by the beam, means for tiltably adjusting the beam with respectto the circle, a trowelling beam carried by the attachment frame withfreedom for vertical movement with respect to the tool beam, and meansfor yieldably pressing the trowelling beam against the road surface.

13. The combination with a road machine having a main frame, avertically and angularly adjustable secondary frame, and an axiallyadjustable circle member carried by the secondary frame, a tool beamcarried by the circle, a plurality of planer blades carried by the beam,a trowelling beam carried by the circle, and means for yieldinglydepressing one of the beams with respect to the other.

14. The combination with a road machine having a main frame, avertically and angularly adjustable secondary frame, and an axiallyadjustable circle member carried by the secondary frame, a tool beamcarried by the circle, a plurality of planer blades carried by the beam,a trowelling beam carried by the circle, and means for adjusting thesecondary frame including a control mechanism having a yieldable portionpermitting limited movement between the two frames.

15. The combination with a road machine having a main frame, avertically and angularly adjustable secondary frame, and an axiallyadjustable circle member carried by the secondary frame, a tool beamcarried by the circle, a plurality of planer blades carried by the beam,a trowelling beam carried by the circle, and means for adjusting thesecondary frame including a control mechanism having a yieldable portionpermitting limited movement between the two frames, one of said beamsbeing mounted with freedom for limited vertical movement with respect tothe other beam.

16. The combination with a road machine having a main frame, avertically and angularly adjustable secondary frame, and an axiallyadjustable circle member carried by the secondary frame, a tool beamcarried by the circle, a plurality of planer blades carried by the beam,a trowelling beam carried by the circle, and means for adjusting thesecondary frame including a control mechanism having a yieldable portionpermitting limited movement between the two frames,

IUD

one of said beams being mounted with freedom for limited verticalmovement with respect to the other beam, and spring means tending toyieldably press said movable beam toward the road surface.

17. The combination with a road machine having a vertically andangularly adjustable tool frame and a circle member carried by saidframe for adjustment about a vertical axis, of a .tool

beam disposed transversely of the machine under the circle and securedthereto for adjustment therewith, a series of parallel planer bladessecured under and to the beam, and a distributing member disposedrearwardly with respect to the blades and also carried by the circle soas to be adjustable therewith and in unison with the tool beam.

18. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool support having adraft connection with said frame, a tool, comprising a sub-frame havinga plurality of parallel cutting edges lying in a plane andadapted toplane material from the surface of the road and work it in a selecteddirection, and a leveling and distributing member adapted to receiveplaned material from said cutting edges to work said material in theopposite direction while creating a road "surface in a selected plane,means for positioning the tool to establish a desired road surface,comprising aligned pivotal connections between the tool support and saidtool, means for adjusting said tool about the axis of said pivotalconnections for positioning and maintaining said cutting edges in aplane parallel to the plane of the desired road surface, and secondaligned pivotal connections between said leveling and distributingmember and said sub-frame permitting relative movement therebetween.

19. The combination with a road machine having a vertically andangularly adjustable tool frame and a circle member carried by saidframe for adjustment about a vertical axis, of a tool beam disposedtransversely of the machine under the circle and rigidly secured theretofor adjustment therewith, a series of planer blades secured under and tothe beam, and a transversely disposed distributing plate disposedrearwardly with respect to the blades and also carried by the circle soas to be adjustable therewith and in unison with the tool beam.

20. The combination with a road machine having a vertically andangularly adjustable tool frame and a circle member carried by saidframe for adjustment about a vertical axis, of a tool beam disposedtransversely of the machine under the circle and rigidly secured theretofor adjustment therewith, a series of planer blades secured under and tothe beam, and a distributing plate disposed rearwardly with respect tothe blades and also carried by the circle so as to be adjustabletherewith and in unison with the tool beam, said distributing platebeing vertically movable with respect to the blades, and means foryieldingly depressing the plate with respect to the blades.

21. The combination with a road machine having a vertically andangularly adjustable tool frame and a circle member carried by saidframe for adjustment about a vertical axis, of an attachment framedetachably secured to the circle member so as to be axially, vertically,and angularly adjustable therewith, a pair of road working units.carriedby the attachment frame in fore and aft positions and transversely withre.

spect to the machine, and means for vertically adjusting the roadworking units with respect to each other, the forward of said unitshaving a series of angularly disposed blades for cutting strips of roadsurface, and the rear of said units having an upright face for effectinga transverse distribution of the cut road material.

22. The combination with a road machine having a vertically andangularly adjustable tool frame and a circle member carried by saidframe for adjustment about a vertical axis, of an at tachment framedetachably secured to the circle member so as to be axially, vertically,and angularly adjustable therewith, a pair of road working units carriedby the attachment frame in fore and aft positions and transversely withrespect to the machine, and spring means for yieldably depressing one ofthe units with respect to the other, a series of angularly disposedblades for cutting strips of road surface, and the rear of said unitshaving a front face surface for laterally distributing the cut roadmaterial.

23. 'I'he combination with an axially, vertically, and angularlyadjustable circle member of a road machine, of an attachment framerigidly secured to the circle so as to be adjustable therewith, a

tool beam secured to the attachment frame, a plurality of planer toolscarried by the beam, and a transversely disposed distributing membercarried by the attachment frame and disposed for operation on the roadsurface rearwardly of the planer tools.

24. The combination with an axially, vertically, and angularlyadjustable circle member of a road machine, of an attachment framerigidly secured to the circle so as to be adjustable therewith, a toolbeam secured to the attachment frame, a plurality of planer toolscarried by the beam, means for tiltably adjusting the beam with respectto the circle, a transversely disposed distributing member carried bythe attachment frame and vertically movable with respect to the toolbeam, and means for yieldably pressing the distributing member againstthe road surface.

25. The combination with a road machine having a main frame, avertically and angularly adjustable secondary frame, and an axiallyadjustable circle member carried by the secondary frame, a tool beamcarried by the circle, a plurality of planer blades carried by the'beam,a distributing beam carried by the circle, and means for yieldinglydepressing one of the beams with respect to the other.

26. The combination with a road machine having a main frame, avertically and angularly adjustable secondary frame, and an axiallyadjustable circle member carried by the secondary frame, a tool beamcarried by the circle, a plurality of planer blades carried by the beam,a transversely disposed distributing plate carried by the circle, andmeans for adjusting the secondary frame including a control mechanismhaving a yieldable portion permitting limited movement between the twoframes.

27. The combination with a road machine having a main frame, avertically and angularly adjustable secondary frame, and an axiallyadjustable circle member carried by the secondary frame, a tool beamcarried by the circle, a plurality of planer blades carried by the beam,a

distributing beam carried by the circle, and

-with freedom for limited vertical movement with respect to the otherbeam.

28. The combination with a road machine having a main frame, avertically and angularly adjustable secondary frame, and an axiallyadjustable circle member carried by the secondary frame, a tool beamcarried by the circle, a plurality of planer blades carried by the beam,a distributing beam carried by the circle, and means for adjusting thesecondary frame including a control mechanism having a yieldable portionpermitting limited movement between the two frames, one of said beamsbeing mounted with freedom for limited vertical movement with 4 respectto the other beam, and spring means tending to yieldably press saidmovable beam toward the road surface.

29. In a road machine for planing and resurfacing a road during traversethereof, a frame, a tool having a draft connection with saidframecomprising planing means including a plurality of cutting edges lying ina plane and distributing means having a fixed angular relation withrespect to said planing means, means for adjusting said tool toestablish a desired road surface, comprising means for positioning andmaintaining said tool in position to make a cut of selected depth, meansfor leveling said tool to position said cutting edges in a planeparallel to the plane of the desired road surface, and means permittingadjustment of said distributing means vertically with respect ,to saidplaning means to create a road surface parallel to the plane of saidcutting edges.

30. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame comprising a sub-frame having a plurality ofparallel cutting edges secured thereto, means for positioning said toolto establish a desired road surface, comprising -means for adjustingsaid tool about a longitudinal axis to vary the angular relation betweenthe plane of said cutting edges and a horizontal plane, means forvarying the angle of said cutting edges with respect to the line ofdraft, and means for adjusting said tool about a transverse axis to varythe angular relation between the plane of said cutting edges and ahorizontal plane.

31. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame comprising a sub-frame having a plurality ofparallel cutting edges secured thereto, means for positioning said toolto establish a desired road surface, comprising means for varying theangle of said cut ting edges with respect to the line of draft, andmeans for adjusting said tool about a transverse axis to vary theangular relation between the plane of said cutting edges and ahorizontal plane.

32. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame comprising a sub-frame having a plurality ofparallel cutting edges secured thereto, and a leveling blade connectedto said sub-frame, means for positioning said tool to establish adesired road surface, comprising means for adjusting said tool about alongitudinal axis to vary the angular relation between the plane of saidcutting edges and a hori zontal plane, means for varying the angle ofsaid cutting edges with respect to the line of draft, means foradjusting said tool about a transverse axis to vary the angular relationbetween the plane of said cutting edges and a horizontal plane, andmeans permitting adjustment of said leveling blade vertically withrespect to said sub-frame to create a road surface in a plane parallelto the plane of said cutting edges.

33. In a road machine for planing and resurfacing a road during traversethereof, a frame I having front and. rear supports, a tool having adraft connection with said frame comprising a sub-frame having aplurality of parallel cutting edges secured thereto and a leveling bladeconnected to said sub-frame, means for positioning said tool toestablish a desired road surface, comprising means for varying the angleof said cutting edges with respect to the line of draft, means foradjusting said tool about a transverse axis to vary the angular relationbetween the plane of said cutting edges and a horizontal plane, andmeans permitting adjustment of the leveling blade vertically withrespect to said sub-frame to create a road surface in a plane parallelto the plane of said cutting edges. v

34. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame, comprising a plurality of parallel cuttingedges lying in a plane and adapted to plane material from the surface ofthe road and work it in a selected direction, and a leveling anddistributing blade adapted to receive planed material from said cuttingedges to work said material in the opposite direction while creating aroad surface in a selected plane, means for positioning said too-l toestablish a desired road surface, comprising means for adjusting saidtool about a longitudinal axis to vary the angular relation between theplane of said cutting edges and a horizontal plane, means forpositioning and maintaining either end of said tool in leading position,means for positioning and maintaining said cutting edges in a planeparallel to the plane of the desired road surface, and means permittingrelative vertical movement of the distributing blade with respect tosaid cutting edges to create a road surface in a plane parallel to theplane of said cutting edges.

35. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame, comprising a plurality of parallel cuttingedges lying in a plane and adapted to plane material from the surface ofthe road and Work it in a selected direction, and a leveling anddistributing blade adapted to receive planed material from said cuttingedges to work said material in the opposite direction while creating aroad surface in a selected plane, means for positioning said tool toestablish a desired road surface, comprising means for positioning andmaintaining either end of said tool in leading position, means forpositioning and maintaining said cutting edges in a plane parallel tothe plane of the desired road surface, and means for permittingadjustment of said leveling and distributing plate vertically withrespect to said cutting edges to create a road surface in a planeparallel to the plane of said cutting edges.

36. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a ,draftconnection with said frame, comprising a plurality of parallel cuttingedges lying in a plane and adapted to plane material from the surface ofthe road and work it in a selected direction, and a leveling anddistributing blade adapted to receive planed material from said cuttingedges to work said material in the opposite direction while creating aroad surface in a selected plane, means for positioning said tool toestablish a desired road surface, comprising means for adjusting saidtool about a longitudinal axis to vary the angular relation between theplane of said cutting edges and a horizontal plane, means forpositioning and maintaining said cutting edges in a plane parallel tothe plane of the desired road surface, and means permitting adjustmentto said leveling and distributing plate vertically with respect to saidcutting edges to create a road surface in a plane parallel to the planeof said cutting edges.

37. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame, comprising a plurality of parallel cuttingedges lying in a plane and adapted to plane material from the surface ofthe road and work it in a selected direction, and a leveling anddistributing blade adapted to receive planed material from said cuttingedges to work said material in the opposite direction while creating aroad surface in a selected plane, means for positioning said tool toestablish a desired road surface, comprising means for positioning andmaintaining said cutting edges in a plane parallel to the plane of thedesired road surface, and means for permitting adjustment of theleveling and distributing blade vertically with respect to said cuttingedges.

38. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame, comprising a plurality of parallel cuttingedges lying in a plane and adapted to plane material from the surface ofthe road and work it in a selected direction, and a leveling anddistributing blade adapted to receive planed material from said cuttingedges to work said material in the opposite direction while creating aroad surface in a selected plane, means for positioning said tool toestablish a desired road surface, comprising means for positioning andmaintaining either end of said tool in leading position, means forpositioning and maintaining said cutting edges in a plane parallel tothe plane of the desired road surface, means for permitting saidleveling and distributing blade to be adjusted vertically with respectto said cutting edges, and means for adjusting either end of said toolvertically to vary the angular relation of the plane of said cuttingedges to a horizontal plane.

39. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame, comprising a plurality of parallel cuttingedges lying in a plane and adapted to plane material from the surface ofthe road and work it in a selected direction, and a leveling anddistributing blade adapted to receive planed material from said cuttingedges to work said material in the opposite direction while creating aroad surface in a selected plane, means for positioning said tool toestablish a desired road surface, comprising means for positioning andmaintaining said cutting edges in a plane parallel to the plane of thedesired road surface,

means permitting adjustment of the leveling and distributing bladeverticallywith respect to said cutting edges to create a road surface ina plane parallel to the plane of said cutting edges, and means foradjusting either end of said tool vertically to vary the angularrelation of the plane of said cutting edges toia horizontal plane.

40. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool support having adraft connection with said frame, a tool, comprising a plurality ofparallel cutting edges lying in a plane and adapted to plane materialfrom the surface of the road and work it in a selected direction, and aleveling and distributing blade adapted to receive planed mate'rial fromsaid cutting edges to work said material in the opposite direction whilecreating a road surface in a selected plane, means for positioning saidtool to establish a desired road surface, comprising aligned pivotalconnections between said tool support and said tool, means for adjustingsaid tool about the axis of said pivotal connections for positioning andmaintaining said cutting edges in a plane parallel to the plane of thedesired road 100 surface, and pivoted connecting means for permittingadjustment of the leveling and distributing blade vertically withrespect to said cutting edges to create a road surface in a planeparallel to the plane of said cutting edges.

41. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool supporthaving adraft connection with said frame, a tool, comprising a subframe having aplurality of parallel cutting edges lying in a plane and adapted toplane material from the surface of the road and work it in a selecteddirection, and a leveling and distributing blade adapted to receiveplaned material from said cutting edges to work said material 115 in theopposite direction while creating a road surface in a selected plane,means for positioning said tool to establish a desired road surface,comprising aligned pivotal connections between said tool support andsaid tool, means for adjusting 120 said tool about the axis of saidpivotal connections for positioning and maintaining said cutting edgesin a plane parallel to the plane of the desired road surface, secondaligned pivotal connections between said leveling and distributing bladeand said sub-frame, and yieldable means for permitting said blade to beadjusted vertically about the axis of said second pivotal connections tocreate a road surface in a selected plane parallel to the plane of saidcutting edges.

42. In a road machine for planing and resurfacing a road during traversethereof, a frame having front and rear supports, a tool having a draftconnection with said frame, comprising a plurality of parallel cuttingedges lying in aplane and adapted to plane material from the surface ofthe road and work it in a selected direction, and a leveling anddistributing blade adapted to receive planed material from said cuttingedges to work said material in the opposite direction while creating aroad surface in a selected plane, means for positioning said tool toestablish a desired road surface, comprising means for positioning andmaintaining either end of said tool in leading position, and means forpermitting adjustment of 145 said leveling and distributing bladevertically with respect to said cutting edges to create a road surfacein a selected plane parallel to the plane of said cutting edges.

Y JAMES E. CARLSON. 150

